Roof Rafter Span Tables Australia

Use recommended minimum roof pitches as specified by roof sheet supplier.

Roof rafter span tables australia.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Tables such as those for rafters floor joists and ceiling joists require the spacing of members to be known. Flat roof span tables allow for a maximum roof pitch of 5º.

Or selected in order to obtain the. This is set by the roof use you selected in the previous screen and cannot be modified. Maximum span of lintel mm tile roof 240 x 35 2600 2100 1000. If you are looking for span tables design guides install guides product catalogues or safety data sheets then you ve landed on the right page.

1 refer to general notes for information that is relevant for all span tables. Use the single span tables for the purpose of obtaining the appropriate size. The imposed uniformly distributed live load in the main span. Stress grades and timber sizes combine to determine the spanning ability of load carrying members.

Table assumes a maximum flooring mass of 40kg m2. Pitching beams 23. Wind classification n1 n2. 2 for design parameters refer to figure 7 26.

For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m. 3 where rafters are equal to or exceed four times their breath blocking should be used to reduce distortion. A maximum roof pitch of 25 degrees is assumed.

Our experienced support team can assist with enquiries ranging from beam sizing to installation advice. Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Joists crippled over supports shall be considered as single span joists. From span table c the maximum allowable single span is 2160mm.

Pergola rafter spans for 600 mm and 900 mm spacing. Technical diagram span tables f7 rafters on page 35 30mm m aximum allow able sp ans mm sheet roof spacing mm rafter size 600 760 900 1000 1200 66 x 30 1250 1150 1050 1000 950 90 x 30 1650 1550 1550 1400 1300 138 x 30 2600 2300 2150 2000 1800 185 x 30 3000 2650 2450 2350 2150 230 x 30 3050. Reading off the empty under table with h 5m hc 2 5m span table c will be used to determine the spans. Rafter or uss spacing w lintel span sheet roofing tiled roofing roof load width rlw mm.

Step 4 assume the wind classification for the area is n1 and the roofing profile is stramit corrugated cladding 0 48mm bmt thickness in a single span configuration. Rafter spans for southern yellow pine douglas fir and eastern spruce. Spantec has prepared these tables for use by people skilled in the design and specification of the type of.